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发明公开
CN103878381A 高纯球形钨粒的制备方法 无效 - 撤回

高纯球形钨粒的制备方法
摘要：
本发明涉及一种高纯球形钨粒的制备方法，包括如下步骤：（1）将球形仲钨酸铵在1000℃～1250℃的高温下煅烧6～12小时，制备氧化钨；（2）将氧化钨进行还原，还原温度为1250℃～1450℃、还原时间为10～12小时，在氢气纯度为99.99%，露点为-83℃、小舟量的环境下还原；（3）还原之后进行球磨，消除在还原过程中产生的团聚和结块，获得均匀分散的球形钨粒；（4）经球磨后的球形钨粒再进行筛分处理，获得高纯度球形钨粒。本发明制备的高纯球形钨颗粒尺寸为0.1～2mm，纯度大于99.95％，球形率大于97%。
摘要（英）：

The invention relates to a preparation method for high-purity spherical tungsten particles. The preparation method comprises the following steps of: (1) calcining spherical ammonium paratungstate for 6-12 hours at a high temperature of 1000-1250 DEG C to prepare tungsten oxide; (2) reducing tungsten oxide for 10-12 hours at a reduction temperature of 1250-1450 DEG C, and reducing in an environment with a hydrogen purity of 99.99%, a dew point of minus 83 DEG C and a low boat loading amount; (3) ball-milling after reduction, and eliminating agglomerations and blocking generated during the reduction process to obtain uniformly-dispersed spherical tungsten particles; (4) carrying out sieving treatment on the ball-milled spherical tungsten particles to obtain the high-purity spherical tungsten particles. The high-purity spherical tungsten particles prepared by the preparation method disclosed by the invention have a size of 0.1-2mm, a purity of greater than 99.95% and a spherical rate of greater than 97%.

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